ONTO Innovation officer has 530 shares withheld for tax

ONTO INNOVATION INC. reported a Form 4 for officer Yoon Ah Oh, SVP, General Counsel and Corporate Secretary.

Accepted by SEC EDGAR 05/18/2026 - 05:01 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

ONTO INNOVATION INC. reported a Form 4 for officer Yoon Ah Oh, SVP, General Counsel and Corporate Secretary. On this date, 530 shares of common stock were withheld by the company at $271.77 per share to cover tax obligations from vesting of restricted or performance stock units. After this non-market tax-withholding transaction, the officer directly holds 21,110 common shares.

Insider Trade Summary

Exercise Price or Tax Liability: 530 shares

Exercise Price or Tax Liability 1 txn

Insider OH Yoon Ah

Role SVP, Gen Counsel & Corp Sec

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	530	$271.77	$144K

Holdings After Transaction: Common Stock — 21,110 shares (Direct)

Holdings Before and After: Common Stock, 21,640 to 21,110 shares (Direct)

Footnotes (1)

1. F1. Represents shares withheld by Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock unit or performance stock unit grants previously received by the Reporting Person.

Key Figures

Shares withheld for tax: 530 shares Withholding price per share: $271.77 per share Shares held after transaction: 21,110 shares

3 metrics

Shares withheld for tax 530 shares Tax-withholding disposition for vested RSU/PSU grants

Withholding price per share $271.77 per share Value used for the 530 withheld shares

Shares held after transaction 21,110 shares Direct common stock ownership following tax withholding

Key Terms

restricted stock unit, performance stock unit, tax withholding obligations, Form 4

4 terms

restricted stock unit financial

"in connection with the vesting of restricted stock unit or performance stock unit grants"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

performance stock unit financial

"in connection with the vesting of restricted stock unit or performance stock unit grants"

A performance stock unit is a type of reward companies give to employees, usually managers, that depends on how well the company performs over time. If the company hits specific goals, the employee earns shares of stock, like earning a prize for reaching certain levels in a game. It motivates employees to work hard because their rewards are tied to the company's success.

tax withholding obligations financial

"shares withheld by Issuer to satisfy tax withholding obligations in connection with the vesting"

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did ONTO (ONTO) report in this Form 4?

ONTO reported that officer Yoon Ah Oh had 530 common shares withheld to cover tax obligations tied to vesting equity awards. This was an internal tax-withholding disposition, not an open-market stock sale or purchase.

Was the ONTO (ONTO) Form 4 transaction an open-market sale?

No. The filing shows a tax-withholding disposition where 530 shares were withheld by the issuer to satisfy tax obligations on vesting restricted or performance stock units, rather than a discretionary sale in the open market.

How many ONTO (ONTO) shares does the reporting person hold after the transaction?

Following the tax-withholding transaction, officer Yoon Ah Oh directly holds 21,110 shares of ONTO Innovation common stock. This figure reflects the position after 530 shares were withheld to satisfy equity award-related tax obligations.

What price per share was used for the ONTO (ONTO) tax-withholding shares?

The 530 shares withheld for tax obligations were valued at $271.77 per share. This price is used in the Form 4 to calculate the aggregate value of the shares delivered to cover the reporting person’s tax liability on vested awards.

What triggered the tax-withholding in the ONTO (ONTO) Form 4 filing?

The tax-withholding was triggered by the vesting of restricted stock unit or performance stock unit grants previously received by the reporting person. The company withheld 530 shares to satisfy the associated tax obligations at the time of vesting.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

OH Yoon Ah

(Last) (First) (Middle)

C/O ONTO INNOVATION INC.

16 JONSPIN ROAD

(Street)

WILMINGTON MASSACHUSETTS 01887

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ONTO INNOVATION INC. [ ONTO ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Gen Counsel & Corp Sec

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/15/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/15/2026		F		530(1)	D	$271.77	21,110	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents shares withheld by Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock unit or performance stock unit grants previously received by the Reporting Person.

	By: Eric French For: Yoon Ah Oh	05/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)